The Hirobo HI0304113 mixing arm is intended for use with EMBLA SZM2 helicopters and provides the tail mixing linkage that coordinates servo outputs into directional tail control.
Replace a faulty arm with this part to reinstate correct mixing and trim; the emphasis here is on checking fit rather than material claims, so verify the geometry against your helicopter before installation.
Installation advice: extract the worn linkage, align the replacement with existing geometry, and secure fasteners following the same torque and safety methods used on EMBLA SZM2 units. After fitting, validate servo endpoints and perform a cautious hover to confirm correct tail direction and trim settings.
Maintenance advice: check pivots and fasteners for play on a regular schedule, and replace any worn connectors to help maintain precise tail control and avoid erratic behavior in flight.
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